Boyd’s Bible Dictionary:

(brazen mouth). (1) Chief of the Korhite Levites, and high priest (Ex. 6:25; Num. 25:6-15; Josh. 22:30-32). (2) Wicked son of Eli (1 Sam. 1:3; 2:34; 4:4-19; 14:3). (3) A Levite (Ezra 8:33).

Concise Bible Dictionary:

1. Son of Eleazar and grandson of Aaron. He showed his zeal for God in slaying Zimri and Cozbi, for which he was commended by God, who promised His “covenant of peace” to him and his seed, even “the covenant of an everlasting priesthood.” He succeeded Eleazar as high priest (Ex. 6:25; Num. 25:7-13; Num. 31:6; Josh. 22:13-32; Judg. 20:28; 1 Chron. 6:4, 50; 1 Chron. 9:20; Ezra 7:5; Ezra 8:2; Psa. 106:30).
2. Son of Eli: he degraded the priesthood by his wickedness, and was slain with his brother Hophni by the Philistines when the ark was taken. He was father of Ahitub and Ichabod; his wife, overcome with sorrow, dying when the latter was born (1 Sam. 1:3; 1 Sam. 2:34; 1 Sam. 4:4-19; 1 Sam. 14:3).
3. Father of Eleazar who returned from exile (Ezra 8:33).

Strong’s Dictionary of Hebrew Words:

apparently from 6310 and a variation of 5175; mouth of a serpent; Pinechas, the name of three Israelites
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

mouth of pity

Potts’ Bible Proper Names:

Look of compassion; mouth of a serpent, or of brass:―name of three Israelites, Exod. 6:25. {Respectus misericordiae}